Founded in 1978, Sound Of Authority (SOA) is a Chicago-based event production company that provides the finist in sound, lighting, video, and event management services. Our services are available for corporate galas, meetings, presentations, industrial events, concerts, festivals, theatrical productions, and tours. The company is recognized not only for the quality of our productions, but also for the high degree of dedication to client service andprecise attention to detail that each client not only deserves, but expects. SOA extends care and concern providing comfort and trust that builds long term relationships.